What is Polarity: Definition and 164 Discussions

Electrical polarity is a term used throughout industries and fields that involve electricity. There are two types of poles: positive (+) and negative (−). This represents the electric potential at the ends of a circuit. A battery has a positive terminal (+ pole) and a negative terminal (− pole). Interconnection of electrical devices nearly always require correct polarity to be maintained. Correct polarity is essential for the operation of vacuum tube and semiconductor devices, many electric motors, electrochemical cells, electrical instruments, and other devices.

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  1. L

    Is it posible to reverse permntly polarity of a permanentmagnet?

    Im working at this at the moment on this and i was wondering if is posible to reverse polarity of a permanent magnet without expending huge ammounts of energy and keep that polarity
  2. T

    Chemistry Surface Tension And Polarity Of Molecules

    I have a few questions about polarity of molecules, first off i know that soaps/detergents have both a hydrophobic and a hydrophilic end which are essential to is operations but is there anything else about its shape or electronegativity that I am missing, like is it polar/non-poalr cause i...
  3. T

    Chemistry Figuring molecule shapes and polarity

    I am having a lot of trouble understanding the following: 1) How do I determine if the shape is a trogonal planar? Is it because it would have more bonds than the tetrahedral? 2)Is figuring the polarity of a molecule only based on the electronegativity? Please help! I have a big test...
  4. B

    Polarized Free Electrons vs Polarity of Static Magnet

    Question 1: Which type of free polarized electron (spin up or down) is attracted to the true North pole of a static magnet? Question 2: Why is a free electron attracted to or repelled by either pole of a static magnet?
  5. S

    Capacitor Polarity: Determining Polarity Visually & Beyond

    How can you determine the polarity an electrolytic capacitor (if it is indeterminable from a visual inspection)
  6. I

    Does Higher Concentration Increase Solvent Polarity and Affect SN1 Reactions?

    hello, i have a question about polarity and SN1 reactions. If we have two solvent mixtures (ex: 2-propanol) but with different concentrations, would the higher concentration solvent be the more polar due to its higher concentration, meaning that there is an increase in number of molecules and...
  7. E

    Reverse Polarity: Understanding and Application

    So, we are just starting ABEL... and I don't quite understand reverse polarity usefullness or application. Here's the extract from my textbook (Wakerly, 3rd ed.): "In this example, the reverse-polarity equation has one less product term than the normal polarity equation (whatever...the...
  8. P

    How to calculate polarity basic, i know

    i cannot get this i have read through texts, and have made probably incorrect postulates of my own on the matter but canot find an easy, or a way at all to calculate spin. (my postulates are limited to the idea that one or two free electron pairs on a simple molecule with one center aom causes...
  9. P

    Predicting Polarity: Molecule Dipole Moment Questions

    how do i tell when a molecue is poler... i know its when it was dipole moment that do not cancel each other... but how do i know when a molecule had dipole moments... this one is really stunmping me...nad about all thses questions... no I am not reading them off a list... this is a few moths of...
  10. U

    Difference between bond polarity and molecular polarity?

    what is the difference between bond polarity and molecular polarity?
  11. S

    Polarity Question: O-methylnitrobenzene vs p-methylnitrobenzene

    This is a pretty basic polarity question but I'm having a hard time deciding. I had to choose the two major products of methylbenzene with HNO3 and H2SO4. I said that the two major products were O-methylnitrobenzene (1-methyl-2-nitrobenzene) and the other 1-methyl-4-nitrobenzene...
  12. G

    Understanding Welding Polarity: Tips for Using a Mig/Flux Welder

    I have time on my hands these days so I bought a Mig/flux welder. I have no idea what I’ll do with it but I always wanted one. The machine allows welding with wire that has a flux core or with a gas “shield. Presumably the gas or flux prevents oxidation of the metal when heated. The...
  13. S

    How Does Solvent Polarity Impact Absorption and Fluorescence Characteristics?

    changing absorptivity Solvent polarity would affect the wavelength of max absorption peak, but how?? and How the solvent affect the absorption coefficient?? is that related sth called Franck-Condon factor?? Also, Flourescent quantum yield also depend on the solvent polarity?? How...
  14. jimmy p

    Why superconductors repel magnets no matter what polarity

    Hey everyone, got a quickie for u. I'm not sure if there is a proper answer for this question, but could ppl give me brief theories to why superconductors repel magnets no matter what polarity they are. thanks for any input!
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